TY - JOUR N2 - The effect of combination grain refinement with AlTi5B1 master (55 ppm) and Sr-modification with AlSr5 master (20, 30, 40, 50 and 60 ppm) on the microstructure, tensile and hardness properties of AlSi7MgTi cast alloy were systematically investigated. Eutectic silicon was studied by optical and scanning electron microscopy after standard (0.5% HF) and deep etching (HCl). Morphology of eutectic Si changes from compact plate-like (as-cast state) to fibbers (after modification). Si-fibbers in samples with 50 and 60 ppm Sr coarsen probably as a result of over-modification. The optimum mechanical properties has the experimental material which was grain refined and modified with 40 ppm of Sr (UTS = 220.6 MPa; ductility = 6.1%, and 82.3 HBW 5/250/15). L1 - http://journals.pan.pl/Content/109179/PDF/AMM-2018-4-60-Kucharikova.pdf L2 - http://journals.pan.pl/Content/109179 PY - 2018 IS - No 4 EP - 2022 DO - 10.24425/amm.2018.125138 KW - modification KW - refinement KW - eutectic Si morphology KW - deep etching A1 - Kuchariková, L. A1 - Tillová, E. A1 - Bonek, M.S. A1 - Chalupová, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 63 DA - 2018.12.12 T1 - Using Deep Etching in the Study of Eutectic Silicon 3D-Morphology in AlSi7MgTi Cast Alloy SP - 2017 UR - http://journals.pan.pl/dlibra/publication/edition/109179 T2 - Archives of Metallurgy and Materials ER -